<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      //     从以下学员名单中随机选出4个学员：

      // ​	let arr = ["鹿晗","王俊凯","蔡徐坤","彭于晏","周杰伦","刘德华","赵本山"]；

      // ​	注意：不要有重复的学员（封装函数）
      let arr = ["鹿晗","王俊凯","蔡徐坤","彭于晏","周杰伦","刘德华","赵本山"]
      let newArr=[]
      function kk(arr){
        for(let i=1; i<=4;i++){
           const num=Math.floor(Math.random()*arr.length)
          newArr.push(arr[num])
          arr.splice(num,1)
        }
        return newArr
      }
      const res= kk(arr)
      console.log(res);


    </script>
  </body>
</html>
